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Stress-induced alterations in mast cell numbers and proteinase-activated receptor-2 expression of the colon: role of corticotrophin-releasing factor.

Authors
Kim, DH; Cho, YJ; Kim, JH; Kim, YB; Lee, KJ
Citation
Journal of Korean medical science, 25(9):1330-1335, 2010
Journal Title
Journal of Korean medical science
ISSN
1011-89341598-6357
Abstract
This study was performed in order to assess whether acute stress can increase mast cell and enterochromaffin (EC) cell numbers, and proteinase-activated receptor-2 (PAR2) expression in the rat colon. In addition, we aimed to investigate the involvement of corticotrophin-releasing factor in these stress-related alterations. Eighteen adult rats were divided into 3 experimental groups: 1) a saline-pretreated non-stressed group, 2) a saline-pretreated stressed group, and 3) an astressin-pretreated stressed group. The numbers of mast cells, EC cells, and PAR2-positive cells were counted in 6 high power fields. In proximal colonic segments, mast cell numbers of stressed rats tended to be higher than those of non-stressed rats, and their PAR2-positive cell numbers were significantly higher than those of non-stressed rats. In distal colonic segments, mast cell numbers and PAR2-positive cell numbers of stressed rats were significantly higher than those of non-stressed rats. Mast cell and PAR2-positive cell numbers of astressin-pretreated stressed rats were significantly lower than those of saline-pretreated stressed rats. EC cell numbers did not differ among the three experimental groups. Acute stress in rats increases mast cell numbers and mucosal PAR2 expression in the colon. These stress-related alterations seem to be mediated by release of corticotrophin-releasing factor.
MeSH terms
AnimalsColon/*metabolismCorticotropin-Releasing Hormone/antagonists &Enterochromaffin Cells/cytologyMaleMast Cells/*cytology/immunology/metabolismPeptide Fragments/pharmacologyRatsRats, WistarReceptor, PAR-2/*metabolismRestraint, Physical*Stress, Physiological
DOI
10.3346/jkms.2010.25.9.1330
PMID
20808677
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Gastroenterology
Journal Papers > School of Medicine / Graduate School of Medicine > Pathology
AJOU Authors
김장희김영배이광재
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